List of top Chemistry Questions

Which among the following theories explained both shape and strength of the bond in covalent compounds?

What is the hybridization in H_2O molecule?

Which of the following is correct regarding the melting points of ionic, polar covalent and non-polar covalent compounds?

Which type of bond is formed due to transfer of electrons between two dissimilar atoms?

What is the family name of VII A group elements?

An element with atomic number 14 has a valency of

Which of the following periodic classifications is not based on the atomic weights of elements?

The maximum number of electrons that can be accommodated in a subshell with angular momentum quantum number l is

Which among the following is a non-metal?

The electronic configuration of element 'S' is

Which of the following quantum numbers gives information about orientation of orbital?

Which of the following electromagnetic waves has highest velocity?

Which of the following metal liberates H₂ gas on reaction with NaOH?

Who among the following did not propose atomic model?

What is the pH of the salt formed from weak acid and strong base?

Tooth enamel is made up with

Which of the following can't be used as X in the equation given below?
Acid + X Salt + CO₂ + Water

In the equation given below, 100 g of CaCO₃ and 73 g of HCl are used to prepare 18 g of H₂O. If 300 g of CaCO₃ and 146 g of HCl are used, then how many grams of H₂O is produced?
CaCO₃ + 2HCl → CaCl₂ + H₂O+CO₂

Which of the following is/are used to detect acidic or basic nature of a solution?

If Q is the heat energy, determine the nature of the reaction in the following equation :

What is the value of X in the following balanced equation?
 YH₂+O₂ → XH2O

Which of the following is not a chemical process?

The enthalpy of combustion of propane, graphite and dihydrogen at 298 K are –2220.0 kJ mol^–1, –393.5 kJ mol^–1 and –285.8 kJ mol^–1, respectively.The magnitude of enthalpy of formation of propane (C₃H₈) is _____ kJ mol^–1. (Nearest integer)